1 files changed, 65 insertions, 8 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
index 24c5765890fa..c664404a75d4 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
@@ -136,11 +136,6 @@ void rn_update_clocks(struct clk_mgr *clk_mgr_base,
 		}
 	}
 
-	if (should_set_clock(safe_to_lower, new_clocks->phyclk_khz, clk_mgr_base->clks.phyclk_khz)) {
-		clk_mgr_base->clks.phyclk_khz = new_clocks->phyclk_khz;
-		rn_vbios_smu_set_phyclk(clk_mgr, clk_mgr_base->clks.phyclk_khz);
-	}
-
 	if (should_set_clock(safe_to_lower, new_clocks->dcfclk_khz, clk_mgr_base->clks.dcfclk_khz)) {
 		clk_mgr_base->clks.dcfclk_khz = new_clocks->dcfclk_khz;
 		rn_vbios_smu_set_hard_min_dcfclk(clk_mgr, clk_mgr_base->clks.dcfclk_khz);
@@ -153,8 +148,9 @@ void rn_update_clocks(struct clk_mgr *clk_mgr_base,
 	}
 
 	// workaround: Limit dppclk to 100Mhz to avoid lower eDP panel switch to plus 4K monitor underflow.
+	// Do not adjust dppclk if dppclk is 0 to avoid unexpected result
 	if (!IS_DIAG_DC(dc->ctx->dce_environment)) {
-		if (new_clocks->dppclk_khz < 100000)
+		if (new_clocks->dppclk_khz < 100000 && new_clocks->dppclk_khz > 0)
 			new_clocks->dppclk_khz = 100000;
 	}
 
@@ -495,13 +491,33 @@ static bool rn_are_clock_states_equal(struct dc_clocks *a,
 }
 
 
+/* Notify clk_mgr of a change in link rate, update phyclk frequency if necessary */
+static void rn_notify_link_rate_change(struct clk_mgr *clk_mgr_base, struct dc_link *link)
+{
+	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
+	unsigned int i, max_phyclk_req = 0;
+
+	clk_mgr->cur_phyclk_req_table[link->link_index] = link->cur_link_settings.link_rate * LINK_RATE_REF_FREQ_IN_KHZ;
+
+	for (i = 0; i < MAX_PIPES * 2; i++) {
+		if (clk_mgr->cur_phyclk_req_table[i] > max_phyclk_req)
+			max_phyclk_req = clk_mgr->cur_phyclk_req_table[i];
+	}
+
+	if (max_phyclk_req != clk_mgr_base->clks.phyclk_khz) {
+		clk_mgr_base->clks.phyclk_khz = max_phyclk_req;
+		rn_vbios_smu_set_phyclk(clk_mgr, clk_mgr_base->clks.phyclk_khz);
+	}
+}
+
 static struct clk_mgr_funcs dcn21_funcs = {
 	.get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz,
 	.update_clocks = rn_update_clocks,
 	.init_clocks = rn_init_clocks,
 	.enable_pme_wa = rn_enable_pme_wa,
 	.are_clock_states_equal = rn_are_clock_states_equal,
-	.notify_wm_ranges = rn_notify_wm_ranges
+	.notify_wm_ranges = rn_notify_wm_ranges,
+	.notify_link_rate_change = rn_notify_link_rate_change,
 };
 
 static struct clk_bw_params rn_bw_params = {
@@ -618,6 +634,42 @@ static struct wm_table lpddr4_wm_table = {
 	}
 };
 
+static struct wm_table lpddr4_wm_table_with_disabled_ppt = {
+	.entries = {
+		{
+			.wm_inst = WM_A,
+			.wm_type = WM_TYPE_PSTATE_CHG,
+			.pstate_latency_us = 11.65333,
+			.sr_exit_time_us = 8.32,
+			.sr_enter_plus_exit_time_us = 9.38,
+			.valid = true,
+		},
+		{
+			.wm_inst = WM_B,
+			.wm_type = WM_TYPE_PSTATE_CHG,
+			.pstate_latency_us = 11.65333,
+			.sr_exit_time_us = 9.82,
+			.sr_enter_plus_exit_time_us = 11.196,
+			.valid = true,
+		},
+		{
+			.wm_inst = WM_C,
+			.wm_type = WM_TYPE_PSTATE_CHG,
+			.pstate_latency_us = 11.65333,
+			.sr_exit_time_us = 9.89,
+			.sr_enter_plus_exit_time_us = 11.24,
+			.valid = true,
+		},
+		{
+			.wm_inst = WM_D,
+			.wm_type = WM_TYPE_PSTATE_CHG,
+			.pstate_latency_us = 11.65333,
+			.sr_exit_time_us = 9.748,
+			.sr_enter_plus_exit_time_us = 11.102,
+			.valid = true,
+		},
+	}
+};
 
 static unsigned int find_dcfclk_for_voltage(struct dpm_clocks *clock_table, unsigned int voltage)
 {
@@ -722,6 +774,7 @@ void rn_clk_mgr_construct(
 		struct clk_log_info log_info = {0};
 
 		clk_mgr->smu_ver = rn_vbios_smu_get_smu_version(clk_mgr);
+		clk_mgr->periodic_retraining_disabled = rn_vbios_smu_is_periodic_retraining_disabled(clk_mgr);
 
 		/* SMU Version 55.51.0 and up no longer have an issue
 		 * that needs to limit minimum dispclk */
@@ -736,7 +789,11 @@ void rn_clk_mgr_construct(
 			clk_mgr->base.dentist_vco_freq_khz = 3600000;
 
 		if (ctx->dc_bios->integrated_info->memory_type == LpDdr4MemType) {
-			rn_bw_params.wm_table = lpddr4_wm_table;
+			if (clk_mgr->periodic_retraining_disabled) {
+				rn_bw_params.wm_table = lpddr4_wm_table_with_disabled_ppt;
+			} else {
+				rn_bw_params.wm_table = lpddr4_wm_table;
+			}
 		} else {
 			rn_bw_params.wm_table = ddr4_wm_table;
 		}